that to our body all its strength comes from the food we eat, and yet the food passes out through the body. But its savour and its virtue pass into every vein, even as when a man sifts meal the meal passes through each hold, and the bran is sifted out. So also our spirit journeys very far without our will or control, by reason of its nature, not of its will; this happens when we are asleep. Lo, the beasts and also the other creatures covet what they desire rather by virtue of nature than will. It is unnatural for any being to desire danger or death, yet many a thing is constrained to seek one or the other, for the will is stronger than nature. Sometimes the will is stronger than nature, sometimes nature overcomes the will. Such is the case, for example, with carnal desire; it is natural to every man, and yet is sometimes withheld from its natural action by a man's will. All love of treachery is of nature, not of the will.
'By this thou mayest plainly perceive that the Creator of all things hath bestowed one desire and one common nature upon all His creatures, and that is the desire of living for ever. For each being it is natural to desire to live for ever, in so far as its nature may admit. Thou needest not have the doubt thou hadst before, concerning the creatures that have no soul; all creatures, whether possessing souls or not, desire to exist always.'
'Now I understand,' said I, 'what I was before in doubt about, that is, that every creature is desirous of living for ever. This is very apparent in the begetting of offspring.'
